Startino ast ignition system



0. E. HUEBNER. STARTING AND IGNITION SYSTEM.

Patented Dec.

INVEN'TOR. Ofio EHuebzzer ATITORNEY consists principally in automatic means I the spark plug.

. the magnetic paths.

. primary circuit orro E. HUEBNEB,

RATION,

OF TOLEDO, OHIO,

0F TOLEDO, OHIO,

ASSIGNOR TO INDUSTRIAL RESEARCH CORPO- A CORPORATION OF DELAWARE.

STARTING AND IGNITION I SYSTEM;

Application filed January 8,

T 0 all whom it may concern:

Be it known that I, O'r'ro E. Hosanna, residing at Toledo, in the county of Lucas and the State of Ohio, have invented certain new and useful Improvements in Starting and Ignition Systems, of which I declare the following to be a full, clear, and exact description.

This invention relates to improvements in i ition systems for gas engines, afnd increasing the permeability of the field of the induction coil whereby theinutual inductance of the primary and secondary windings is increased,thus increasing the electromotive force induced in the secondary and improving the sparks produced in Thefinvention here described and claimed constitutes an improvement on that disclosed in my copending ap-. plication, Serial uar 11, 1919.

0 far as I am aware, induction coils for gas engine ignition systems heretofore have been built with fixed amounts of metal in At starting and at low speeds, a magnetic path of considerable permeability is desirable in order that there may be a large inductance, the time increment between each make and break in the being sufiicient'to permit tlie current to approach more or less closely the maximum value possible. At high engine speeds the time increment referred to is much smaller, and consequently it is desirable to reduce the permeability of the magntic path of the coilin order to reduce the lag in the current and give it an opportunity to build up. Because of these conditions a coil built for maximum efiiciency at starting will be unsatisfactory for average and high speed running and one built for maximum efficiency at high engine speeds produces an unsatisfactory spark at starting.

It is the principal object of my invention to provide a coil which is capable of giving something near the maximum efliciency both at starting and at high engine speeds.

Another object of the invention is the provision of means for increasing the permeability of the field of an induction coil used for ignition purposes, which means shall be brought into play whenever the engine is running at a low Specification of Letters Patent.

manufacture will appear as I Number 270,684, filed J anautomatically Patented. Dec. 7, 1920.

1919. serial No. 870,824. I

speed and shall be rendered inoperative I whenever the engine speed increases beyond a predetermined point.

A further ob'ect of the invention is the PI'OVISIOII of suc an automatic control without the use of additional electromagnets, or other electrical apparatus, the electromagnetic function of the i nition coil itself being utilized to accomp ishgthe urpose. Other ob ects and objects relating to details of construction and econoinies of proceed with the description of that embodiment oi-the invention which, for the purposes of present application, I have illustrated in the accompanying drawing, in which:

F gure I is a diagrammatic view illustrating the application of my invention to a gas engine provided with an electric start- 111 motor.

i ig. II is a top plan view of the ignition coil and shell therefor '11 the inoperative position.

Fig. III is a vertical cross-section on the line III-III, Fig. II.

Fig. IV is a fied form of induction coil embodying my invention. s

Similar, reference characters refer to similar parts throughout the different views.

In the drawing the numeral '10 represents an ignition coil having a primary winding connected to the circu t wires 11 and 12 in which areconnected also a battery 13 or other source of current, a switch 14 and a current interrupter 15. The latter is driven by a cam 16, mounted upon the camshaft of the engine, and adapted to make and break connectionfour, times for each revolution, it being assumed for purposes of illustration that the engine is a four cylinder one. A condenser 17 is arranged in parallel with the interrupter to decrease sparking. The secondary Winding of the ignition coil is connected at one end to a current distributer 18, and at the other end to the ground, the spark plugs of the engine being diagrammatically indicated at 19.

lining form of my invention, there is secured to the upper end of the spool of the ignition coil, a plate 20 which carries two arms '21 upon ich are pivoted at 22 the two halves 23 or. a metallic shell. Although I have shown tlie shell in two parts only, it is obviously fully within the realm of the the diagrammatic view of a modigreat that invention to sub-divide the shell into any desired number of parts. The parts 23 of the shell are held normally away from the coil by springs 24. As will be obvious, when sufficient electro-magnetic effect is produced by the passage of a current through the coil 10, the shell parts 23 will be attracted toward the coil against the action of the springs 24.

In Fig. IV I have illustrated a modification in which the coil is not provided with a shell but has a core 25 which is slidable within the coil. The coil casing 26 has mounted upon its upper end a yoke 27 supporting a spring 28 which tends to-hold the core 25 part way out of the coil in the position illustrated in the drawing. However, when the electromagnetic effect of the coil is sufficientlw ncreased by the action of a strong currentthrough its primary winding, the tension of the spring 28 is overcome and the core is drawn down into the coil, thereby increasing the permeability of its field.

In Fig. I there is illustrated diagrammatically, in addition to the ignition system, a starting motor and a dynamo with their electrical connctions. 29 represents the motor and 30 the dynamo. 31 is a switch by means of which the starting motor is set in operation, drawing current from the battery 13. When sufficient engine speed is attained, the shunt 32 of the cut-out magnet 33 will be energized enough to cause the magnet to attract its armature 34 whereupon current passes from the third brush 35 of the dynamo through the field 36, the series coil 37 of the cut-out, through the closed switch 14, interrupter 15, wire 11, primary of theinduction coil, wire 12 and wire 38 back to the dynamo.

he operation of my invention is-auto matic. At starting and at low running speeds, current from the battery 13 is strong enough to energize the induction coil as an electro-magnet to attract the shell parts 23 or core 25, as the case may be, thus bringing more metal into the path 'of the magthe inductance and hence the electromotive force induced in the secondary winding, thereby producing hotter sparks 'in the spark plugs of the engine. At high engine speeds this same amount of metal in the undesirable, since it inthe lag, speeds, for the time increment between make and break is then much smaller. When a higher speed is reached, the shell or core being in the inner position, the lag is so the surges of current in the primary wuiding do not attain an amperage sufficient to longer overcome the tension of the spring 24 or 28, as the case may be, and the shell or core thereupon moves to its outer position, whereupon the current lag is somewhat reduced and the current somewhat increased, though not enough to again attract the shell or core until the engine speed is reduced.

am aware that the particular embodiment of my invention above described and illustrated in the accompanying drawing is susceptible of considerable variation without departing from the spirit thereof, and, therefore, I desire to claim my invention broadly as well as specifically, as indicated by the appended claims. l

claim as my invention:

1. In an ignition system for gas engines, an induction coil, and means for increasing the magnetic permeability of the field of. said coil, said means being automatically put into operation when the magnetic field of the coil exceeds a predetermined density.

In an ignition system for gas engines, an induction coil, and means for increasing the magnetic permeability of the field of said coil, said means being automatically put into operation when the magnetic field of the coil exceeds and automatically thrown out of operation when the magnetic field falls below the aforesaid density.

11 an ignition system for gas engines an induction coil, a metallic, magnetic conductor for said coil, and fiesilient means for holding said magnetic conductor out of the shortest magnetic ing proportioned to yield to the magnetic attraction of the coil for the magnetic conductor during the passage through the coil of a current of predetermined strength.

11 an ignition system for gas engines, an induction coil, a metallic, magnetic conductor for said coil resiliently held out of the shortest magnetic path, the current through said coil at low engine speeds energizing said coil sufiiciently to draw said magnetic conductor toward .the shortest.

magnetic path.

5. In an ignition system for gas engines, an induction coil, a metallic shell therefor, means tending to move said shell away from the coil, said coil being proportioned to attract said shell against the action of said means during the passage through the coil of a current of predetermined strength.

6. In an ignition system for gas engines, an induction coil, a pivoted metallic shell therefor, means tending to swing said shell away from the coil, said coil being proportioned to attract said shell against the action of said means during the passage through the coil of a current of predetermined strength.

a predetermined densitypath, said means be 7. In an ignition system for gas engines, an induction coil, a divided shell therefor, means tending to move the parts of said Shell away from the coil, said coil being proportioned to attract said shell parts against the action of said means during the passage 15 of said means during the passage through 7 through the coil of a current of predetermined stre gth. a

8, In a Rgnition system for gas engines, an induction coil, a shell therefor divided longitudinally into aplurality of parts, means tending to move said parts away from the coil, said coil being proportioned to attract said shell parts against the action the coil of a current of predetermined 9. In an ignition coil, a shell therefor divided longitudinally into a plurality of parts, means tending to move said parts away from the coil, a. current source and a current interrupter in circuit with said coil, the current passing at low engine speeds energizing the coil sufficiently to attract said shell parts toward the coil against the action of said means.

In testimony whereof, I aifix my signature.

strength.

system, an induction o'r'ro E. HUEBNER. 

